"SGRAM is a specialized SDRAM which is a clock-synchronized random access memory suitable for the video graphics adaptors.  Unlike VRAM (Video RAM) the SGRAM is single ported but simulates dual port memory operations." (it.toolbox.com)

====== References ======

  * http://it.toolbox.com/wiki/index.php/SGRAM
  * ICE Shared Construction Analysis SCA
    * 9702-528 (Fujitsu MB81G8322-010 8Meg. SGRAM): http://smithsonianchips.si.edu/ice/cd/9702_528.pdf
    * 9702-529 (Hitachi HM5283206FP10 8Mbit SGRAM): http://smithsonianchips.si.edu/ice/cd/9702_529.pdf
    * 9702-530 (Samsung KM4132G271Q-10 8Mbit SGRAM): http://smithsonianchips.si.edu/ice/cd/9702_530.pdf
    * 9703-531 (NEC D481850GE-A10 8Meg. SGRAM): http://smithsonianchips.si.edu/ice/cd/9703_531.pdf